mac mail and comcast
I am using OS X 10.5.8 and my ISP is Comcast. Recently, I have periodically received messages when I'm using Apple's mail program that Comcast's server has rejected the passwords for my email accounts. I waded through the wall of Comcast Level 1 techs telling me the problem is due to the Apple mail program but, as expected, none of them could explain why. In any case, I was eventually transferred to a Level 2 tech person in Comcast's Signature Support team. I explained the problem to the tech and he said he could fix it online but it would cost $49.00! The tech said the settings needed to be changed. What settings could he have referring to because all the settings, at least the ones I have immediate access to, are configured correctly. I have the correct ports set for incoming and outgoing mail, there are no typographical errors, the paaswords are correct etc. I have read previous responses to similar questions but I have tried all the suggested solutions prior to coming here. Any new suggestions?
iMac G5, Mac OS X (10.5.2)